Rivet-setting machine



Patented Apr. 8, 1924.

EDWIN B.

STIMPSON, or BROOKLYN, new YORK, 'AssIeNon T0 EDWIN B. STIMPFSON COMPANY, or BROOKLYN, NEW YORK.

BIVET-SETTING MACHINE.

Application filed November 19, 1921. Serial No. 516,257.v

To all whom it may concern:

Be it known that I, EDWIN B. STIMPSON, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Rivet-Setting Machines, of which the following is a specification.

This invention relates to rivet setting machines and has for its principal object the provision of means whereby the individual rivets, as they come to the rivet pocket, are kept under control and against overturning, etc. The same object has heretofore been partially accomplished by providing a separate element usually in the nature of a finger, which would make contact with the rivet and insure its presentation to the rivet pocket in the proper position and prevent tilting or jumping out of the rivet until the latter was 'struck by the descending plunger.

By my invention I accomplish the object of presenting the rivet to the pocket in the proper position and keeping it there against tilting or jumping out, without the use of any separate finger or other element, andwithout modification of any part of the mechanisms familiarly employed, except as to the active end of the plunger, with an incidental limiting of the upstroke of the plunger.

The principal object of the invention, accordingly, is to make possible the control of the individual rivet from a point at which it enters the rivet pocket until the setting operation takes place, by simple and inexpensive means.

Other objects and aims of the invention, more or less broad than those stated above, together with the advantages inherent, will be in part obvious and in part specifically referred to in the course of the following description of the elements, combinations, arrangements of parts, and applications of principles constituting the invention; and the scope of protection contemplated will appear from the claims.

In the accompanying drawings, which are to be taken as part of this specification, and in which I have shown merely a preferred form of embodiment of. invention:

Figure 1 is a side elevation illustrating part of a rivet setting machine, showing particularly the rivet pocket, the plunger,

the magazine, and the slideway by which rivets pass from the magazine to the pocket;

Figure 2 is an enlarged sectional View and with parts broken away, illustrating some of the subject-matter of Figure 1, with the plunger in the up position;

Figure 3 is a view similar to Figure 2, showing the plunger in the down or rivetsetting position; 1

Figure 4 is a detail elevation illustrating the active end of the plunger;

Figure 5 is a view at right angles to Figure 4;

Figure 6 is an end view of the subjectmatter of Figure 4c or 5.

Referring to the numerals on the drawings, 7 indicates the magazine, 8 the plunger, 9 the rivet pocket, 10 the rivet slideway from the magazine to the pocket, and 11 the transverse out ofl which operates to bring one rivet at a time to thepocket. As is usual in. machines of this kind, the lower end of the slideway 10, below the cut off 11, guides the individual rivets into the pocket 9, and because the descent is by gravity and because the machine operates fairly rapidly and there is apt to be considerable vibration, it often happened that the individual rivet would enter the pocket in a tilted position and might jump out of the pocket, in the absence of some means such as a finger or the like which would guide the rivet into the pocket and hold it in proper position until it (the finger) was moved out of the way as the plunger descended upon the rivet.

By my invention I propose to utilize the active end of the plunger itself as the means for keeping control of the rivet in its passage to and its dwell within the pocket.

' This I accomplish by shaping the end of the plunger as shown in the drawings, for instance, by forming in the end of the plunger a generally semi-circular concavityand then removing the bounding walls of the concavity at the side of the plunger adjacent the end of the slideway 10. Provision is made to limit the upstroke of the plunger to the position shown in Figure 2, and this position coincides with an operation of the machine which permits a single rivet to drop down the lower portion of the slideway 10 below the out ott' 11, the rivet passing, by the force of its descent, into the rivet pocket and immediately below the end of the plunger 8. By reason of the special conformation of the end of the plunger, the rivet is kept under control and tilting or jumping out effectively prevented, as will be obvious from an inspection of Figure 2, in which the rivet just entering the pocket is shown in dotted lines, while the rivet which has come to rest within the pocket is indicated in full lines. In the further operation of the machine, the plunger descends to the Figure 3 position, driving the rivet through the leather or other material 12 and upsetting it against the anvil 14 in a familiar manner, the pocket being made in separable sections to permit of the release of the rivet therefrom as the plunger descends. By reason of the special conformation of the plunger end and of the relations of the parts, it will be evident that the rivet is under actual control of the plunger while it is entering the pocket and while it is in the pocket and until it is driven through the material 12. It will be understood that I have illustrated the end of the plunger as shaped to conform to a round-headed rivet, but it will be evident that with slight changes the plunger may be made to conform to rivet heads of other shapes;

Inasmuch as many changes could bemade in the above construction, and many apparently widely different embodiments of my invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the lan guage used in the following claims is intended to cover all the generic and specific features of the invention herein described and all statements of the scope of the invention which, as a matter of language. might be said to fall therebetween.

I claim:

1. In a machine of the kind described, a raceway for rivets, a plunger operating transversely of the end of the raceway, a rivet pocket at one side of and immediately adjaent the end of the raceway and below the plunger, the end of the plunger being concaved and having the wall which defines the concavity removed at the side adjacent the end of the raceway, asset forth.

2. In a riveting machine, a raceway for rivets having a vertically inclined position with its lower and delivery end portion lying in a substantially horizontal position, a

vertically reciprocating riveting plunger rivets having a vertically inclined position with its lower and delivery end portion lying in a substantially horizontal position, a vertically reciprocating riveting plunger operating across the delivery end of the raceway in close adjacency thereto, said plunger having its lower rivet-engaging end provided with a recess to receive the head of a rivet, and a portion of the side wall of the recess being cut away to provide a passage throughwhich a rivet may pass laterally from the delivery end of the raceway into the recess, the plunger having a position at the limit of its upstroke in which the recessed end and cut-away side wall thereof are in the line of-extension of the race-way.

4. In a riveting machine, a race-way, a plunger reciprocating transversely across the end of the race-way and having an end recess which opens out of both the end and side of the plunger and which has its side opening in line with the end of the race way when the plunger has reached the end of its travel in one direction of movement.

In testimony whereof I afiix my signature.

EDWIN B. STIMPSON. 

